JP4508039B2 - Vehicle alarm device - Google Patents

Description

  The present invention relates to a vehicle alarm device that detects breakage of a window glass of a vehicle and issues a warning to a user.

  2. Description of the Related Art Conventionally, there has been known a vehicle antitheft device that detects a breaking sound of a window glass with a glass breaking sensor and notifies that the window glass is broken based on a detection output (see, for example, Patent Document 1). However, in the conventional vehicle antitheft device, the glass breaking sensor is composed of a microphone, so the impact sound detected is exclusively an audible frequency band sound wave, and erroneously detects not only the breaking sound of the window glass but also noise outside the vehicle. There is a fear.

In order to solve the above problem, whether or not the window glass is broken based on a change in the partial pressure value of the power source applied to the plurality of resistors, provided with a plurality of resistors arranged on the window glass of the vehicle. There is known a glass breakage detecting device for judging the above (for example, see Patent Document 2).
JP 2004-34934 A JP 2003-141649 A

  By the way, in the unguarded state before the warning state where the determination as to whether or not the window glass is broken is started, some abnormality may occur in the resistor or the like, and the window glass resistor may be in a disconnected state. In this case, immediately after the glass breakage detection device is changed from the unguarded state to the alert state, there is a possibility that a false alarm is given to the user even though the window glass is not broken.

  The present invention has been made to solve such problems, and its main object is to prevent false alarms for users.

The object is as described in claim 1.
A conductor disposed on the window glass of the vehicle;
Voltage supply means for supplying a voltage to the conductor;
Voltage detecting means for detecting the voltage of the conductor;
Cutting determination means for determining a cutting state of the conductor based on the voltage of the conductor detected by the voltage detection means;
Based on the determination of the cutting state of the conductor by the cutting determination means, warning determination means for determining whether or not to warn the user;
A warning device for a vehicle, comprising: warning means for giving the warning to the user based on the determination by the warning determination means;
The alarm determination means includes a warning mode for determining that the alarm is performed when the conductor is determined to be in the disconnected state by the disconnection determination means, and the conductor is in a disconnected state by the disconnection determination means. Even if it is determined that there is an alarm, the vehicle alarm device has a warning preparation mode for determining that the alarm is not performed.

  In the present invention, the alarm determination means determines a warning mode for determining whether to perform an alarm when the disconnection determination means determines that the conductor is in a disconnected state, and determines that the conductor is in a disconnected state by the disconnection determination means. A warning preparation mode in which it is determined that no warning is to be issued. Thereby, for example, in the warning preparation mode, when the conductor is determined to be in a disconnected state by the disconnection determination unit, detection and correction of an initial state abnormality such as a contact failure of the wiring, terminal, connector, etc., disconnection, etc. are performed. It becomes possible. Therefore, in the alert mode after the alert preparation mode, it is possible to more reliably determine the disconnection state of the conductor due to the breakage of the window glass. That is, it is possible to reliably prevent a false alarm for the user.

In this case, as described in claim 2, the vehicle alarm device according to claim 1,
The voltage supply means may supply a voltage to the conductor at a predetermined cycle.

Further, as described in claim 3, the vehicle alarm device according to claim 1 or 2,
The warning determination unit may set a predetermined time before the warning mode as the warning preparation mode.

Furthermore, as described in claim 4, the vehicle alarm device according to any one of claims 1 to 3,
The warning determination unit may transition between a no-warning mode in which it is not determined whether or not to perform the warning, the warning preparation mode, and the warning mode.

  ADVANTAGE OF THE INVENTION According to this invention, the false alarm with respect to a user can be prevented.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings. The basic concept, main hardware configuration, operating principle, basic control method, and the like of the vehicle alarm device are known to those skilled in the art, and thus detailed description thereof is omitted.

  FIG. 1 is a schematic block diagram showing a system configuration of a vehicle alarm device according to an embodiment of the present invention. In the vehicle alarm device 1 according to the present embodiment, conductors 5R and 5L such as resistors having a predetermined print pattern are disposed on the left and right rear side glasses 3R and 3L of the vehicle. Also, one end of the resistor 5R of the right rear side glass 3R and one end of the resistor 5L of the left rear side glass 3L are connected in series via the terminal 5a and the wiring 7a.

  One end of a conductor 11 such as a resistor made of a predetermined print pattern disposed on the rear glass 9 is connected in series to the other end of the resistor 5L of the left rear side glass 3L via a terminal 9a and a wiring 7b. ing. The other end of the resistor 11 of the rear glass 9 is grounded (GND) via the terminal 9a and the wiring 7c.

  In addition, as the predetermined print pattern of the resistors 5R, 5L, and 11, in the rear side glasses 3R, 3L and the rear glass 9, one continuous resistor may be folded and disposed on the entire glass, You may arrange | position the resistor which has this to all or one part of glass. One resistor may be arranged at a predetermined position of the glass, or a plurality of resistors may be arranged in parallel. That is, any arrangement method can be applied as long as the breakage of the rear side glasses 3R, 3L and the rear glass 9 can be detected by the disconnection of the resistors 5R, 5L, 11 arranged on the rear side glasses 3R, 3L and the rear glass 9. .

  Further, the resistors 5R, 5L, and 11 may be disposed on the surfaces of the rear side glasses 3R and 3L and the rear glass 9, or may be disposed inside the rear side glasses 3R and 3L and the rear glass 9.

  The resistors 5R, 5L, and 11 disposed on the rear side glasses 3R and 3L and the rear glass 9 are made of a material having transparency and conductivity such as a transparent electrode film in order to ensure the visibility of the driver and the like for safety. It is preferable to use it. For this transparent conductive film, it is preferable to use a material with low absorption loss and high transmittance in order to effectively take incident light into the light absorption layer.

  A power source (+ B) 15 is connected to the resistor 11 of the rear glass 9 via an on / off switchable defogger switch 13 disposed in the vicinity of the driver's seat of the vehicle. When the defogger switch 13 is turned on, a voltage is supplied from the power source 15 to the resistor 11 having a predetermined print pattern disposed on the rear glass 9. The resistor 11 to which the voltage is supplied generates heat, so that cloudiness or frost generated on the rear glass 9 is removed. Thereby, the visibility of the rear glass 9 is improved while the vehicle is running, and the convenience and safety of the vehicle are improved.

  The other end of the resistor 5R of the right rear side glass 3R is connected to a power source 15 (which supplies a voltage to the resistors 5R, 5L, 11, 19 via a diode 17, a resistor 19, and a switching element 21 such as a transistor. + B) is connected. For example, a rechargeable 12V lead battery is used as the power source 15.

  A security ECU (Electronic Control Unit) 23 is connected to the switching element 21. When the switching element 21 receives the ON signal from the security ECU 23, the switching element 21 brings the power supply 15 and the resistor 19 into a conductive state and supplies a voltage to the resistors 5 </ b> R, 5 </ b> L, 11, and 19. On the other hand, when the switching element 21 receives the off signal from the security ECU 23, the switching element 21 turns off the power supply 15 and the resistor 19. The security ECU 23 transmits an ON signal or an OFF signal at a predetermined cycle to the switching element 21 so that a voltage is supplied from the power supply 15 to the resistors 5R, 5L, 11, and 19 at a predetermined cycle. Control.

  The security ECU 23 is composed of a microcomputer, executes various processes according to control and arithmetic programs, and controls a CPU (Central Processing Unit) 23a for controlling each part of the device, and a ROM (an execution program for the CPU 23a). A read only memory) 23b, a readable / writable RAM (Random Access Memory) 23c for storing calculation results, a timer, a counter, an input / output interface 23d, and the like. The timer and the counter are stored in the ROM 23b and realized by a program executed by the CPU 23a.

  A security ECU 23 is connected to the power supply 15 via an on / off switchable ignition (IG) switch 25 and a buffer 27 that is disposed in a driver's seat in the vehicle interior. The buffer 27 has a function of regulating the voltage input from the power supply 15 to the security ECU 23.

  When the ignition switch 25 is turned on, an on signal is input to the security ECU 23. On the other hand, when the ignition switch 25 is turned off, an off signal is input to the security ECU 23 (a state where no on signal is input).

  A security ECU 23 is connected to the other end of the resistor 5R of the right rear side glass 3R via a buffer 29 with a built-in comparator. When a voltage-divided value obtained by dividing the voltage supplied from the power supply 15 to the resistors 5R, 5L, 11, and 19 is input to the comparator of the buffer 29, the input voltage-divided value and a preset value are divided. Compare with pressure value. The comparator of the buffer 29 transmits a Hi signal to the security ECU 23 when it is determined in this comparison that the input partial pressure value is larger than a preset partial pressure value. On the other hand, the comparator of the buffer 29 transmits a Lo signal to the security ECU 23 when determining that the input partial pressure value is smaller than the preset partial pressure value.

  The resistance value of the resistor 19 is set smaller than the sum of the resistance values of the resistors 5R, 5L, and 11. For example, when the resistance value of the resistor 19 is set to 2 kΩ, the sum of the resistance values of the resistors 5R, 5L, and 11 is set to 10 kΩ, and the reference voltage of the buffer 29 is set to 4 V, the divided voltage of the power supply 15 input to the buffer 29 The value is 2V. In this case, the buffer 29 determines that the divided voltage value 2V is smaller than the preset reference voltage 4V, and transmits a Lo signal to the security ECU 23.

  For example, the rear side glass 3R, 3L or the rear glass 9 is broken, and the resistors 5R, 5L, 11 disposed on the rear side glass 3R, 3L or the rear glass 9 are disconnected, or the rear side glass 3R, 3L and the rear glass 9 In an abnormal state (hereinafter referred to as a glass abnormal state) such as a contact failure or disconnection of the wirings 7a, 7b, 7c, 7d, terminals 5a, 9a, connectors, etc. between them, the buffer 29 has a power supply voltage of 12V. Is entered. In this case, the power supply voltage 12V input to the buffer 29 is larger than a preset reference voltage 4V. Therefore, the buffer 29 transmits a Hi signal obtained by inverting the Lo signal to the security ECU 23.

  Based on the binary signal of the Hi signal or Lo signal transmitted from the buffer 29, the security ECU 23 detects an abnormal glass state such as a crack in the rear side glass 3R, 3L or the rear glass 9.

  For example, when the security ECU 23 continuously receives the Hi signal from the buffer 29 for a predetermined time T2 (for example, 10 ms) or more, the rear side glasses 3R, 3L and / or the rear glass 9 are broken, and the resistors 5R, 5L, 11 are disconnected. It is determined that the glass is in an abnormal state such as a state. On the other hand, when the security ECU 23 receives the Lo signal from the buffer 29, the rear side glasses 3R, 3L and the rear glass 9 are not broken, the resistors 5R, 5L, 11 are not disconnected, and the rear side glasses 3R, 3L and the rear glass. The wirings 7a, 7b, 7c, 7d between the terminals 9 and the terminals 5a, 9a, connectors, and the like are determined to be in a normal state (hereinafter referred to as a normal glass state) such as a state in which contact failure or disconnection does not occur.

  When the security ECU 23 determines that the glass is in the normal state, the security ECU 23 sets 1 to the normality determination flag and stores it in the RAM 23c. The initial value of the normality determination flag is set to 0 in advance and stored in the RAM 23c.

  The security ECU 31 is connected with an alarm means 31 for alarming the user. When the security ECU 23 determines that the rear side glass 3R, 3L or the rear glass 9 is broken and the resistors 5R, 5L, 11 are in an abnormal glass state such as a broken wire, the security ECU 23 transmits an alarm signal to the alarm means 31. When the alarm means 31 receives an alarm signal from the security ECU 23, the alarm means 31 issues an alarm to the user, thereby improving the security of the vehicle.

  As the alarm means 31, for example, an alarm sound such as a horn may be generated, or a vehicle lamp such as a hazard lamp, a head lamp, or a small lamp may be lit or blinked. Furthermore, a warning display may be displayed on a display unit such as a display or LED in the vehicle interior. That is, any warning means 31 can be applied as long as a warning can be given to the user.

  The security ECU 23 is connected to a door switch 33 that is disposed at each door of the vehicle and detects the locked state (locked) and unlocked state (unlocked) of each door. The door switch 33 transmits a lock signal to the security ECU 23 when the vehicle door is locked. On the other hand, the door switch 33 transmits an unlock signal to the security ECU 23 when the vehicle door is unlocked.

  For example, the security ECU 23 determines that the ignition switch 25 is in an OFF state based on an OFF signal from the ignition switch 25, and sets all vehicle doors to a locked state based on a lock signal from each door switch 33. Judge that there is. The security ECU 23 recognizes that a predetermined time T1 (for example, 1 to 3 seconds) has elapsed from the time when this determination is made is in a warning preparation state (a warning preparation mode).

  Also, the security ECU 23 is in a warning state (warning mode) after a predetermined time T1 has elapsed since it has been determined that the ignition switch 25 is in the on state and all vehicle doors are in the locked state. Recognize. Furthermore, the security ECU 23 recognizes that there is no alert state (no alert mode) except in the alert state and the alert preparation state. Note that the security ECU 23 does not detect an abnormal glass state in this unwarranted state.

  By the way, in the conventional alarm device, when the wiring between the glass of the vehicle, the terminal, the connector, etc. has poor contact and the wire breakage occurs, when the security ECU changes from the unguarded state to the alert state, the resistance of the resistor due to the glass breakage As a disconnection, a false alarm may be given to the user.

  On the other hand, in the vehicle alarm device 1 according to the present embodiment, the security ECU 23 first transitions from the no-warning state to the warning preparation state, and the wirings 7a, 7b, 7c, 7d, terminals 5a, 9a, and connectors in the initial state. Detection of abnormal glass state (defective initial state) such as poor contact and disconnection. Thereafter, after a predetermined time T1 has elapsed, the security ECU 23 transitions from the alert preparation state to the alert state, and glass such as disconnection of the resistors 5R, 5L, and 11 caused by cracks in the rear side glasses 3R, 3L and / or the rear glass 9. An abnormal state is detected and an alarm is given to the user. Thereby, the false alarm with respect to a user can be prevented reliably.

  Next, the control process of the vehicle alarm device 1 according to the present embodiment will be described. FIG. 2 is a flowchart illustrating an example of a control flow of the vehicle alarm device 1 according to the present embodiment. The processing routine shown in FIG. 2 is repeatedly executed every predetermined minute time, for example, every 64 ms.

  Based on the OFF signal from the ignition switch 25 and the lock signal from the door switch 33, the security ECU 23 determines whether the vehicle is in a warning preparation state or a warning state (S100).

  When the security ECU 23 determines that the vehicle is in a warning preparation state or a warning state, the security ECU 23 transmits an ON signal to the switching element 21 in a predetermined cycle. When the switching element 21 receives the ON signal from the security ECU 23, the switching element 21 is in a conductive state, and supplies a voltage from the power source 15 to the rear side glasses 3R, 3L and the rear glass 9 at a predetermined cycle. Thereby, security ECU23 starts the detection of glass abnormal states, such as a crack of rear side glass 3R, 3L and rear glass 9, (S110).

  Next, the security ECU 23 determines whether or not the normal determination flag is 1 and there is a history of determining that the glass is in a normal state in the past (S120).

  When the security ECU 23 determines that there is a history of determining that the glass is in a normal state in the past (normal determination flag = 1), the security ECU 23 determines whether the vehicle is in a warning state (S130).

  When the security ECU 23 determines that the vehicle is in a warning state, the security ECU 23 determines whether a Hi signal has been received from the buffer 29 (S140). On the other hand, when the security ECU 23 determines that the vehicle is not in the alert state, the security ECU 23 ends the routine of this control process.

  When it is determined that the Hi signal has been received from the buffer 29, the security ECU 23 determines whether or not the Hi signal has been continuously received for a predetermined time T2 (ms) or more (S150). On the other hand, when it is determined that the security ECU 23 has not received the Hi signal from the buffer 29 (the Lo signal has been received), the routine of this control process ends.

  When the security ECU 23 determines that the Hi signal is continuously received from the buffer 29 for a predetermined time T2 or more, the rear side glasses 3R, 3L and / or the rear glass 9 are broken, and the resistors 5R, 5L, 11 are disconnected. It is determined that the glass is in an abnormal state. In this case, the security ECU 23 transmits an alarm signal to the alarm means 31. When the alarm means 31 receives an alarm signal from the security ECU 23, the alarm means 31 issues an alarm to the user (S160). On the other hand, when the security ECU 23 determines that the Hi signal has not been continuously received from the buffer 29 for the predetermined time T2 or more, the routine of this control process is terminated.

  In the determination process (S120), the security ECU 23 determines whether or not a Hi signal has been received from the buffer 29 when it is determined that there is no history of normal glass determination (normal determination flag = 0) in the past ( S170). In this case, the security ECU 23 recognizes that the vehicle is in a warning preparation state.

  When determining that the Hi signal has been received from the buffer 29, the security ECU 23 determines whether or not the Hi signal has been continuously received for a predetermined time T2 or more (S180). On the other hand, when the security ECU 23 determines that the Hi signal is not received from the buffer 29 (the Lo signal is received from the buffer), whether or not the Lo signal is continuously received for a predetermined time T2 or more. Is determined (S190).

  When the security ECU 23 determines that the Hi signal has been continuously received from the buffer 29 for a predetermined time T2 or more, the wiring 7a, 7b, 7c between the rear side glasses 3R, 3L and the rear glass 9 in preparation for warning. , 7d, terminals 5a, 9a, connectors, etc., are determined to be in an abnormal glass state such as a contact failure or disconnection (initial state failure) (S200), and the control processing routine is terminated. On the other hand, when the security ECU 23 determines that the Hi signal has not been continuously received from the buffer 29 for the predetermined time T2 or more, the security ECU 23 ends the routine of this control process.

  In the determination process (S190), when the security ECU 23 determines that the Lo signal is continuously received from the buffer 29 for a predetermined time T2 or more, the security ECU 23 sets the normal determination flag to 1 (S210), and this control process This routine ends. On the other hand, when the security ECU 23 determines that the Lo signal has not been continuously received from the buffer 29 for the predetermined time T2 or more, the security ECU 23 ends the routine of this control process.

  In the vehicle alarm device 1 according to the present embodiment, the security ECU 23 first transitions from the no-warning state to the warning preparation state, and the wirings 7a, 7b, 7c, 7d, terminals 5a, 9a, connectors, etc. in the initial state Detection of abnormal glass state (defective initial state) such as poor contact and disconnection. Thereafter, after a predetermined time T1 has elapsed, the security ECU 23 transitions from the alert preparation state to the alert state, and glass such as disconnection of the resistors 5R, 5L, and 11 caused by cracks in the rear side glasses 3R, 3L and / or the rear glass 9. An abnormal state is detected and an alarm is given to the user. Thereby, the false alarm with respect to a user can be prevented reliably.

  As mentioned above, although the best mode for carrying out the present invention has been described using one embodiment, the present invention is not limited to such one embodiment, and within the scope not departing from the gist of the present invention, Various modifications and substitutions can be made to the above-described embodiment.

  For example, in the above embodiment, the resistor 19, the resistor 5R of the right rear side glass 3R, the resistor 5L of the left rear side glass 3L, and the resistor 11 of the rear glass 9 are connected in series in this order. However, the resistor 5R of the right rear side glass 3R, the resistor 5L of the left rear side glass 3L, and the resistor 11 of the rear glass 9 may be connected in series in any order.

  In the above embodiment, the abnormal glass state is detected for the rear side glasses 3L and 3R and the rear glass 9, but the abnormal glass state is detected for any vehicle glass such as the front side glass and the front glass. May be. Specifically, when detecting an abnormal glass state of the front side glass, a resistor is provided on the front side glass, and the rear side glass 3L, 3R or the rear glass 9 is connected in series.

  In (S200) of the above embodiment, the security ECU 23 caused poor contact or disconnection of the wiring 7a, 7b, 7c, 7d, the terminals 5a, 9a, the connectors, etc. between the rear side glasses 3R, 3L and the rear glass 9. When it is determined that the glass is in an abnormal state such as a state, the alarm unit 31 may notify the user of the abnormality. Thereby, the user can recognize the initial failure of the apparatus 1.

  In the above embodiment, when the alarm means 31 receives an alarm signal from the security ECU 23, the alarm means 31 may notify the mobile terminal owned by the user, such as a mobile phone or a wireless key, of the abnormal glass state. In this case, the alarm means 31 has a transceiver, and notifies the user's portable terminal via the transceiver.

  In the above embodiment, the buffer 29 converts the disconnection of the resistors 5R, 5L, and 11 into a binary signal of Hi signal or Lo signal, and the security ECU 23 uses the resistor 5R, 5L based on the binary signal. 11 is detected, but a change in the resistance value of the resistors 5R, 5L, and 11 is detected, and based on the change in resistance value, the disconnection of the resistors 5R, 5L, and 11 is determined. May be.

  In the above embodiment, the present invention is applied to the vehicle alarm device 1 used for a vehicle, but is not limited to this, and as a home crime prevention device, an alarm that detects a crack in a home window glass and gives an alarm. It may be applied to an apparatus and can be applied to any application.

  In the above embodiment, the security ECU 23 corresponds to a disconnection determination unit and an alarm determination unit described in the claims. The disconnection determination unit and the alarm determination unit are realized by a program stored in the ROM 23b of the security ECU 23 and executed by the CPU 23a.

  INDUSTRIAL APPLICABILITY The present invention can be used for a vehicle alarm device that detects a glass breakage, a breakage, or the like of a vehicle and issues a warning to a user. The appearance, weight, size, running performance, etc. of the vehicle to be mounted are not limited.

1 is a schematic block diagram illustrating a system configuration of a vehicle alarm device according to an embodiment of the present invention. It is a flowchart which shows an example of the control flow of the alarm device for vehicles which concerns on one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle alarm device 3R Right side rear glass 3L Left side rear glass 5R Resistor 5L Resistor 9 Rear glass 11 Resistor 15 Power supply 23 Security ECU
31 Alarm means

Claims (4)

A conductor disposed on the window glass of the vehicle;
Voltage supply means for supplying a voltage to the conductor;
Voltage detecting means for detecting the voltage of the conductor;
Cutting determination means for determining a cutting state of the conductor based on the voltage of the conductor detected by the voltage detection means;
Based on the determination of the cutting state of the conductor by the cutting determination means, warning determination means for determining whether or not to warn the user;
A warning device for a vehicle, comprising: warning means for giving the warning to the user based on the determination by the warning determination means;
The alarm determination means includes a warning mode for determining that the alarm is performed when the conductor is determined to be in the disconnected state by the disconnection determination means, and the conductor is in a disconnected state by the disconnection determination means. Even if it is determined that there is a warning preparation mode for determining that the warning is not performed,
When it is determined that the conductor is in a disconnected state by the disconnection determination unit in the warning preparation mode, the initial state is determined to be defective. No warning device for vehicles, characterized in that no warning is given . The vehicle alarm device according to claim 1,
The vehicle alarm device, wherein the voltage supply means supplies a voltage to the conductor at a predetermined cycle. The vehicle alarm device according to claim 1 or 2,
The vehicle warning device, wherein the warning determination unit sets the predetermined time before the warning mode is set to the warning preparation mode. The vehicle alarm device according to any one of claims 1 to 3,
The vehicle alarm device, wherein the alarm determination means makes a transition between a no-warning mode in which it is not determined whether to perform the warning, the warning preparation mode, or the warning mode.

Images